Patents by Inventor Henk Roemersma

Henk Roemersma has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5450348
    Abstract: A digitizing device includes a digitizing tablet having, for each of the two coordinate directions, a first grid winding divided into regularly repeated strip conductor groups and a second grid winding divided into regularly repeated strip conductor groups which are offset with respect to each other at different spacings over the entire work surface. A trigger circuit charges the grid windings with periodic signals in a predetermined sequence, the charges following each other essentially without interruption. However, an interruption time period is provided between the end of charging the grid windings for the other coordinate direction and the start of charging of the grid winding for the one coordinate direction. A scanning coil to be placed upon the digitizing table is connected to an evaluating circuit. The evaluating circuit and the trigger circuit galvanically are separated from each other and operate independently of each other.
    Type: Grant
    Filed: February 22, 1994
    Date of Patent: September 12, 1995
    Assignee: Aristo Graphic Systeme GmbH & Co. KG
    Inventor: Henk Roemersma